In reply to Rog Wilko:
> I don't think you can call it "the" Arapiles.
You can, if you want to annoy people. Some people used to say it, the 'the', not sure why, then it became a thing, people saying it was wrong. Then it became a thing to say it deliberately just for a joke and to wind people up.
It's become a bit of an in-joke, like 'the peaks district' and arguing over the grade of Three Pebble Slab.